DETERMINATION OF HENRY LAW CONSTANTS OF ORGANICS IN DILUTE AQUEOUS-SOLUTIONS

Henry's law constants of 15 volatile organic compounds in dilute aqueo us solutions were measured by the procedure of equilibrium partitionin g in a closed system. The method is based upon the measurement of the headspace concentration by gas chromatography. The compounds investiga ted included six halogenated hydrocarbons, four aromatic hydrocarbons, and five alkanes. The measurements were made at three temperatures be tween 25 and 45-degrees-C. The measured Henry's law constants compared well with the literature data of some liquids. The temperature depend ence of Henry's law constant was also studied from the van't Hoff rela tion.